Qualify a second source for critical items
When it may fit: One supplier controls a key input.
Evidence needed: Alternative suppliers and tests.
Trade-off: Qualification cost and time.
Manufacturing Intelligence Brief
How to Evaluate Supplier Concentration Risk
Relying on one supplier for a critical material is efficient until it is not. The question is how much a disruption or price increase from a key supplier would cost.
1. The business problem
What happens if our key supplier raises prices or cannot deliver?
Single sourcing can lower price and simplify quality, but it concentrates risk. A supplier problem, from a price increase to a plant fire, can stop production or force an expensive switch.
The task is to measure how much of the spend depends on a few suppliers and how hard they would be to replace.
2. What the evidence can reveal
A concentration review looks at three things:
- Calculated Share of materials spend with the top suppliers, and by material.
- Calculated Effect of a price increase or disruption on cost and output.
- Calculated How easily each supplier could be replaced: qualification time, alternatives and switching cost.
- Information gap Supplier financial health, location and contract terms.
Concentration is least tolerable where an item is critical and substitutes are hard to find.
3. Investigate the problem
In the synthetic plant, Calculated materials cost $27.3M a year, about half of total production cost, and rose 11.0%. A 1% change in materials cost per unit is worth about $273K a year, more than a 1% change in volume at about $262K.
Illustrative A simple stress test, with invented figures: suppose one supplier provides 40% of materials, about $10.9 million. A 5% price increase from that supplier alone would cost about $546,000 a year, about 7% of the $8.30M operating profit. A supplier failure that stopped production for a week would cost much more.
Hypothesis Materials cost has grown faster than volume, which suggests that price is already a factor, and a concentrated supplier base would have less room to resist. Information gap Supplier-level spend, contract terms and alternatives are not in the demo. A list of the top ten suppliers by spend, flagged for items with no qualified alternative, is the first step.
4. Explore the interactive experience
Investigate it yourself.
Manufacturing Performance Dashboard: a product-line dashboard with downtime and scrap, a scenario simulator for volume, price, materials and scrap, evidence-linked answers from APIS, and a sample brief, all on synthetic data.
The experience below is built on a synthetic manufacturer, “Demo Components Inc.” It has no inventory, supplier or material-usage records, so it is used to show the production and cost side of the picture. Nothing in it is real.
- In the Scenario tab, the preset raises materials cost per unit by 5%. Note the profit effect.
- Compare it with a 5% fall in price per unit.
- Ask APIS how sensitive profit is to materials cost.
5. Evaluate possible solutions
Reducing supplier risk takes time and costs money, so focus on critical items.
6. What leadership should do next
Questions to answer
- Which suppliers account for most spend?
- Which items have no alternative?
- What would a price rise cost?
- What would a disruption cost?
Data to gather
- Spend by supplier and item
- Contracts
- Supplier health information
- Alternatives
Steps to take
- Rank suppliers by spend and risk.
- Stress-test the top three.
- Qualify alternatives for critical items.
- Review annually.
7. Engage Two Pillars
Identify Opportunities Across Production, Costs, and Capacity
Two Pillars can help manufacturers investigate production performance, cost structure, inventory and capital investment decisions using your own plant data. A good first step is a supplier concentration review with a stress test of the largest dependencies.
Sources and data notes
- The organization, its figures, and every number in this article and its interactive experience are synthetic and illustrative. They are not real data, a benchmark, or a forecast.
- Reviewed October 2026. This article describes an approach to investigation. It does not replace review by qualified professionals.